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If you crave all the comforting flavors of your favorite pie but want something heartier and packed with wholesome ingredients, this Vegetarian Pizza Casserole with White Beans and Rice Recipe is an absolute game-changer. It combines the melty goodness of mozzarella cheese with tender vegetables, fragrant herbs, and satisfying white beans and rice, making it a nourishing and delicious one-dish meal. Each bite delivers a perfect harmony between classic pizza flavors and the warm familiarity of a casserole, ideal for cozy dinners or feeding a crowd with ease.

Ingredients You’ll Need
What makes this casserole such a winner is the simplicity and balance of each ingredient. Every component plays a special role, bringing layers of flavor, texture, and color that make the dish vibrant and inviting.
- Olive oil: A heart-healthy fat that helps soften and caramelize the vegetables perfectly.
- Yellow onion: Adds a sweet, aromatic base that enriches the casserole’s overall flavor.
- Red bell pepper: Brings a burst of color and subtle sweetness, brightening every bite.
- Zucchini: Offers a tender texture and freshness that balances the richness of cheese and sauce.
- Garlic cloves: Infuse the dish with a fragrant depth that complements the herbs beautifully.
- Dried oregano: Provides classic Mediterranean notes that scream pizza night.
- Dried basil: Adds a sweet, slightly minty aroma that enhances the tomato sauce.
- Crushed red pepper flakes (optional): A subtle kick to awaken the palate without overpowering.
- Salt and black pepper: Essential seasonings that bring all the flavors into harmony.
- Cooked white beans: A creamy, protein-rich element that adds satisfying body to the casserole.
- Cooked brown rice: Nutty, chewy grains that provide a wholesome base for the casserole.
- Pizza or marinara sauce: The saucy hero that ties the entire dish together.
- Shredded mozzarella cheese: Gooey and melty, delivering that irresistible pizza cheesiness.
- Grated Parmesan cheese (optional): Adds a sharp, salty contrast that deepens the cheese flavor.
- Fresh parsley or basil: A fresh, herbal finishing touch that brightens each serving.
How to Make Vegetarian Pizza Casserole with White Beans and Rice Recipe
Step 1: Sauté the Vegetables
Start by heating olive oil in a large skillet over medium heat. Toss in the diced yellow onion, red bell pepper, and chopped zucchini, cooking them for about five to seven minutes until they soften and release their natural sweetness. Add minced garlic, dried oregano, dried basil, crushed red pepper flakes if you like some heat, and season with salt and black pepper. Stir everything together and cook for another minute to let the fragrant herbs infuse the veggies perfectly.
Step 2: Combine the Base Ingredients
In a large mixing bowl, gently mix together the cooked brown rice, creamy white beans, and the sautéed vegetable mixture. Pour in the pizza or marinara sauce and stir well until every bite will have that signature tangy tomato flavor evenly distributed. This step is key to building the casserole’s rich, comforting foundation.
Step 3: Assemble the Casserole
Lightly grease a 9×13-inch casserole dish to prevent sticking. Pour the rice, beans, and veggie mixture into the dish, smoothing it out into an even layer so every corner gets the perfect amount of cheesy topping. Sprinkle shredded mozzarella cheese evenly over the top, and if you’re a fan of a little extra punch, add the grated Parmesan cheese now. This cheesy layer will bubble and brown beautifully in the oven.
Step 4: Bake to Perfection
Preheat your oven to 375°F (190°C). Place the casserole in the oven uncovered and bake for 20 to 25 minutes. You’ll know it’s done when the cheese is melted, golden, and bubbly—an inviting signal that the casserole is ready to enjoy.
Step 5: Garnish and Serve
Allow the casserole to cool just slightly so it sets and slices without falling apart. Sprinkle the top with freshly chopped parsley or basil for a vibrant pop of color and a fresh herbal aroma that complements every cheesy, tomato-laden bite.
How to Serve Vegetarian Pizza Casserole with White Beans and Rice Recipe

Garnishes
Beyond fresh parsley and basil, you can sprinkle crushed red pepper flakes for extra heat or a drizzle of good-quality olive oil to add some luxurious mouthfeel. A few shavings of Parmesan just before serving also elevate the overall experience and add that savory, nutty twist.
Side Dishes
This casserole is a complete meal on its own but pairs beautifully with a crisp green salad lightly tossed with lemon vinaigrette or a simple bowl of roasted vegetables. Garlic bread or a warm baguette also makes for a delightful side to sop up leftover sauce and melted cheese.
Creative Ways to Present
Serve the casserole family-style in the baking dish for that warm, hearty vibe, or scoop individual portions into beautiful bowls topped with a handful of fresh arugula or baby spinach. You can even pack it into mason jars for an on-the-go lunch that feels indulgent yet wholesome.
Make Ahead and Storage
Storing Leftovers
This Vegetarian Pizza Casserole with White Beans and Rice Recipe keeps beautifully in the fridge for up to four days. Store leftovers in an airtight container to maintain freshness and prevent the casserole from drying out.
Freezing
If you want to plan ahead, this casserole freezes really well. Portion it into freezer-safe containers or wrap the whole baking dish tightly in plastic wrap and foil. Freeze for up to three months, and just remember to thaw it overnight in the fridge before reheating.
Reheating
Reheat individual portions in the microwave until warmed through, or pop the entire dish back in a 350°F oven covered with foil to keep moisture locked in. Heat for about 15 to 20 minutes or until bubbly and hot all the way through. Add a little extra cheese on top before reheating to refresh that gooey pizza feel.
FAQs
Can I use other types of beans in this casserole?
Absolutely! While white beans are creamy and mild, you can swap in cannellini, great northern, or even chickpeas. Just make sure they’re cooked and drained well to maintain the right texture.
Is it possible to make this recipe gluten-free?
Yes, this casserole is naturally gluten-free as long as your pizza or marinara sauce does not contain any gluten additives. Always check labels or opt for trusted gluten-free brands to be safe.
Can I make this casserole vegan?
Definitely! Simply substitute the mozzarella and Parmesan with vegan cheese alternatives or nutritional yeast for a cheesy flavor without dairy. Olive oil or vegan butter can be used for sautéing the veggies.
What can I add to make this dish spicier?
To turn up the heat, increase the crushed red pepper flakes or add a dash of cayenne pepper while cooking the vegetables. You can also include spicy Italian sausage-style vegan crumbles if you want some extra protein and kick.
How do I get the rice to be perfectly cooked for this casserole?
Use brown rice that’s cooked just until tender but not mushy, so it holds its shape in the casserole. Leftover rice from a previous meal works great, making this also an excellent way to use up small amounts of cooked grains.
Final Thoughts
I can’t recommend the Vegetarian Pizza Casserole with White Beans and Rice Recipe enough for anyone seeking that comforting pizza flavor in a nourishing, hearty package. It’s a joyful blend of wholesome ingredients, cheesy goodness, and fresh herbs that makes every meal feel special. Give it a try next time you want a dinner that’s simple to prepare but bursting with layers of deliciousness you’ll want to revisit again and again.
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